{"id":"CVE-2026-47735","summary":"Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses RBAC table-level checks","details":"Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc's user-SQL validator (`internal/api/query.go:ValidateSQLRequest`) blocked only `read_parquet(` and `arc_partition_agg(` via regex denylist. The broader DuckDB I/O function family — `read_csv_auto`, `read_csv`, `read_json`, `read_json_auto`, `read_text`, `read_blob`, `glob`, `parquet_metadata`, `parquet_schema`, `read_xlsx`, etc. — was not blocked. RBAC table-reference extraction inspected only `FROM`/`JOIN` clauses, so scalar table functions in the `SELECT` list slipped past both layers. This is fixed in 2026.06.1 via a structural sandbox at the DuckDB layer. After lockdown, DuckDB refuses to open any file outside the allowlist and refuses further `INSTALL`/`LOAD`. Already-loaded extensions remain callable. Some workarounds are available. Restrict API access to known-trusted networks via firewall rules or, as a temporary mitigation, add `read_csv*`/`read_json*`/`glob` etc. to `dangerousSQLPattern` in `internal/api/query.go`.","aliases":["GHSA-p2j4-c4g6-rpf5","GO-2026-5523"],"modified":"2026-08-27T11:30:54.217032300Z","published":"2026-08-21T22:42:55.886Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"cwe_ids":["CWE-200","CWE-22","CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47735.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"2026.06.1"}]}],"cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/Basekick-Labs/arc/releases/tag/v26.06.1"},{"type":"ADVISORY","url":"https://github.com/Basekick-Labs/arc/security/advisories/GHSA-p2j4-c4g6-rpf5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47735.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47735"},{"type":"FIX","url":"https://github.com/Basekick-Labs/arc/commit/91bdc29d1a02178ccf8c66375eccf85203108dfb"},{"type":"FIX","url":"https://github.com/Basekick-Labs/arc/pull/442"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/basekick-labs/arc","events":[{"introduced":"0"},{"fixed":"91bdc29d1a02178ccf8c66375eccf85203108dfb"},{"fixed":"8038f6f80f77bb48dbaa220e7415957be3988eff"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v26.05.1","v26.04.1","v26.03.2","v26.03.1","v26.02.2","v26.02.1","v26.01.2","v26.01.1","v25.12.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47735.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}